PENBERTHY TUBULAR GLASS LIQUID LEVEL …...Penberthy tubular glass gauges are mounted to the vessel...

PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKS

FEATURES

• Reliable, easy to understand level reference.• Gives users the ability to inspect liquid

characteristics visually.• Non-intrusive.• No electrical power required. Provide

accurate direct liquid level measurement in remote locations where power is not available. Not affected by power failures.

• Provide a near-unlimited length of measure.• Plain transparent and redline glass available.• Wide range of glass protectors provides

improved protection.• Glass unions provide superior pressure and

temperature ratings.• Can be supplied to meet ASME requirements.• Straight and offset pattern gaugecocks

available.• Ball check shut-off prevents loss of process

fluid in the event of an accidental breakage of the gauge glass.

GENERAL APPLICATION

Used to register liquid levels in low to medium pressure applications in the petroleum, chemical and general process industries, including steam boiler service.

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TECHNICAL DATA

MaterialsGlass: High pressure, heavy wall

or red line Gaugecocks: Bronze, iron, steel,

stainless steelGlass size: ⅝” and ¾” (DN 18 and 20)Connections: ½” to 1" (DN 15 to 25) Pressure ratingsGlass: to 600 psi (41.4 bar)Gaugecocks: to 750 psi at 100°F

(51.7 bar at 38°C)Temperature ratingGlass: to 425°F (218°C)Gaugecocks: -300°F to 750°F

(-184°C to 399°C)

Low to medium pressure gauges and gaugecocks for direct visual identification of liquid levels

N2 GAUGECOCKS N6 LOWER GAUGECOCK

N7 GAUGECOCKS

2

PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSGAUGES

OVERVIEW

Penberthy tubular glass gauges are mounted to the vessel externally and use tubular glass to provide direct visual verification of the liquid level present. The transparent glass also provides an excellent means to inspect fluid characteristics optically.

Liquid enters the gauge through the lower tank connection. The meniscus present in the glass tube corresponds to the liquid level in the tank.

A wide range of accessories allows you to customize each gauge to your specific application requirements. These options can also provide enhanced level indication and protection for the tubular glass.

ProtectorsTubular glass is susceptible to accidental breakage. To counteract this condition, a variety of protectors is offered which prevent damage to the glass but do not restrict level indication capability. In some cases the protector actually enhances it. Protectors can be adapted to fit most major manufacturers’ gaugecocks.

Guard rods - Two or four metallic rods placed next to the glass tube.

Plastic or wire glass - A transparent box surrounding the tubular glass constructed from either clear plastic or wire glass.

Sheet metal - Two pieces of sheet metal formed to protect both sides of the tubular glass. The front and back are left open to facilitate easy viewing.

Refractive - An extruded aluminum channel with a choice of either a polymer or glass cover. The interior is a white anodized finish with 45° angle red stripes on the back wall. As the gauge fills, liquid passes in front of the stripes. The refractive nature of the liquid changes the stripe angle showing the highly visible contrast between liquid presence and absence.

If water is the liquid used, the stripes become horizontal. Liquids with a refractive index less than water will alter the angle less, higher indexes will alter the angles more. The refractive protector is designed for use with standard tubular glass.

Internal heating or cooling tubesA stainless steel internal heating or cooling tube that passes through the length of the tubular glass can be used in conjunction with an offset pattern gaugecock and high pressure glass.

Glass unionIntended for use in gauges over 48” in height, it allows you to join two pieces of glass within the same gauge. This increases the length of the gauge, yet maintains the same pressure/temperature rating as the individual pieces of glass. Glass unions should be used in conjunction with the refractive protector to provide mechanical stability.

N2 GAUGECOCKS N6 GAUGECOCK N7 GAUGECOCKS

3

10 ( 254) 410 (2830) 600 (4140) 340 (2340) 310 (2140) 345 (2380) 275 (1900)15 ( 381) 385 (2650) 600 (4140) 310 (2140) 280 (1930) 325 (2240) 265 (1830)20 ( 508) 355 (2450) 600 (4140) 285 (1960) 265 (1830) 315 (2170) 260 (1790)25 ( 635) 300 (2070) 580 (4000) 260 (1790) 250 (1720) 300 (2070) 250 (1720)30 ( 762) 275 (1900) 550 (3790) 230 (1590) - - -35 ( 889) 240 (1650) 500 (3450) 200 (1380) - - -40 (1016) 210 (1450) 420 (2890) 180 (1240) - - -45 (1143) 200 (1380) 360 (2480) 170 (1170) - - -50 (1270) 180 (1240) 340 (2340) 160 (1100) - - -55 (1397) 150 (1030) N/A 140 ( 970) - - -60 (1524) 140 ( 970) N/A 120 ( 830) - - -65 (1651) 125 ( 860) N/A 100 ( 690) - - -70 (1778) 100 ( 690) N/A 90 ( 620) - - -

PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSGAUGES

TABLE 1 - PRESSURE/TEMPERATURE RATINGS FOR GAUGES WITH A SINGLE PIECE OF TUBULAR GLASS (BOTH ⅝” AND ¾”)Center to center distance for vessel connections inch (mm)

No corrosion up to 150°F (66°C) psig (kPa) Steam boiler service up to 425°F (218°C) psig (kPa)High pressure Heavy wall Red line High pressure Heavy wall Red line

TABLE 3 - OPTIONS AVAILABLE FOR THE DIFFERENT TYPES OF TUBULAR GLASSGlass type (both ⅝” and ¾”)

OptionsGaugecocks Hydraulic adapters Guard rods Plastic or wire glass protector Sheet metal Refractive protector Internal tube

High pressure X X X X X X XHeavy wall X X X X X - -Red line X X X X X - -Glass union X X - - - X X

TABLE 2 - TEMPERATURE RATINGS FOR TYPICAL PACKING MATERIALPacking Type Maximum temperature rating °F (°C)Grafoil® (standard) 425 (218)Teflon® 425 (218)Neoprene® 300 (149)Viton® 400 (204)

Using secured glass unions and multiple pieces of tubular glass will increase the pressure/temperature rating over that of an equivalent length of single glass.

Hydraulic adaptersHydraulic adapters are used in place of gaugecocks for connecting the gauge to the vessel. They attach directly to the ends of the tubular glass, providing a ½” NPT male connection. This allows you to incorporate most standard hydraulic connections currently available.

DimensionsTo obtain the length of glass tubing needed to make up a gauge set for given vessel center-to-center dimension:

Glass tubing length = (vessel center-to-center dimension) - (dimension X)

To obtain the length of guard rods for given gaugecock center-to-center dimension:

Guard rod length = (gaugecock center-to-center dimension) - (dimension Y)

4

PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSGAUGECOCKS

OVERVIEW

Penberthy tubular glass gaugecocks are for use in low to medium pressure applications. Available in offset and straight patterns, they isolate the tubular glass from the liquid contents of the vessel.

They are available with a combination of features for a range of uses, including union or solid shank vessel connections and a choice of stuffing box sizes for various glass diameters. All stuffing box connections are designed for positive seal with minimum radial compression.

Gaugecock seat leakage is Class I per ISA RP39.6, FCI 70-2 (formerly ASME B16. 105) and/or IEC 60534-4.

Offset gaugecocks have the advantage of permitting the inside of the tubular glass to be cleaned easily with a minimum of disassembly. By removing the vent and drain plugs (or other connection), a straight passage is opened through the tubular glass. A brush can be inserted through the gaugecock vent and drain for glass cleaning.

Automatic ball check shut-offTo prevent rapid loss of fluid in the event of accidental glass breakage, Penberthy gaugecocks are supplied with automatic ball check shut-off. Should the glass break, the pressure drop causes the ball checks to seat to prevent loss of tank contents. To unseat these ball checks during the liquid level readings, the tip of the gaugecock stem has an extension that pushes the ball away from its seat while allowing the gauge column to fill as liquid contents pass around the ball. Stainless steel retainers prevent reverse seating of balls or loss of balls during installation.Both upper and lower gaugecocks in each set are equipped with horizontal ball checks. Balls are located on the vessel side of the gaugecock seats.Gaugecocks with ball checks omitted meet ASME boiler requirements. As an alternative method to ASME boiler requirements, the lower gaugecock is available with an optional vertical rising ball check located in the offset portion of the gaugecock body and the upper gaugecock has a leaky seat.

VERTICALLY RISING BALL CHECK

BALL

BALL SUPPORT

PLUG

BODY

5

PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSSERIES N2/K2 OFFSET PATTERN GAUGECOCKS

OVERVIEW

The N2 and K2 Series include models N2A/K2A, N2B/K2B and N2C/K2C. They are offered in steel or 316 stainless steel materials, in ½” to 1” (DN 15 to 25) sizes, with a 300 P-CL ANSI rating and a wide range of features in offset pattern design.

Pressure (max.): 750 psi at 100°F (51.7 bar at 38°C)Temperature range: -300°F to 750°F (-184°C to 399°C)

FEATURES

• Offset pattern allows easy cleaning.• Integral bonnet (N2 series).• Union bonnet (K2 series).• Union vessel connection.• Ball check shut-off prevents loss of process fluid in the event of an accidental breakage of the

tubular glass.• Integral seat (N2 series).• Threaded renewable seat (K2 series). • Can be supplied to meet ASME requirements.• Wide variety of vessel connections available.

A variety of optional features are available when specified. Optional materials can be specified for the gaugecock body and trim (trim consists of the stem, stem packing retainer, ball check and seat (K2 series only)). Standard and optional materials conform to ASTM specifications.

ASME Boiler CodeSeries N2 and K2 gaugecock sets that are acceptable for ASME Boiler Code are available as an option.

For steam/water service in excess of 350 psi [24 bar], transparent flat glass gauges with tubular adapters and shields are recommended.

TABLE 4 – CENTER-TO-CENTER AND GUARD ROD DIMENSIONS (SEE DIMENSIONS ON PAGE 3)Model Dimension X, in. (cm) Dimension Y, in. (cm)All models 1 ⅞ (4.8) 2 ⅜ (6.0)

TABLE 5 - PRESSURE/TEMPERATURE (SUBJECT TO LIMITATIONS OF TUBULAR GLASS)Maximum working pressure psi (kPa) at temperatures to:

Model -300°F (-184°C) -20°F (-29°C) 100°F (38°C) 300°F (149°C) 400°F (204°C) 500°F (260°C) 750°F (399°C)Steel and 316 STS (N2A/K2A) 675 (4650) 675 (4650) 675 (4650) 610 (4210) 590 (4070) 555 (3830) 400 (2760)Steel and 316 STS (N2B/K2B, N2C/K2C) 750 (5170) 750 (5170) 750 (5170) 675 (4650) 655 (4520) 610 (4210) 450 (3100)

6

'X'

'A'

'B'

'X'

'A'

'X'

'X'


TABLE 6 - N2/K2 DIMENSIONSConnection Dimension 'A' in inch (cm) Dimension 'B' in inch (cm)Union½" NPTM 4⅜ (11.1) -¾" NPTM 4½ (11.4) -1" NPTM 4 ⅝ (11.7) -Socketweld½" Male union 4 ⅜ (11.1) -¾" Male union 4 ½ (11.4) -1" Male union 4 ⅝ (11.7) -Flanged½"-150 P-CL R.F. 4 ⅝ (11.7) -½"-300 P-CL R.F. 4 ⅝ (11.7) -¾"-150 P-CL R.F. 4 ¾ (12.1) -¾"-300 P-CL R.F. 4 ¾ (12.1) -1"-150 P-CL R.F. 4 ⅞ (12.4) -1"-300 P-CL R.F. 4 ⅞ (12.4) -

Ball

Stem

Stem packing nut

StarGlass packing

Vent connection = ¾" NPTFDrain connection = ½" NPTF

Vessel tailpipe

Ball retainer

Glass packing nut

Vessel coupling nut

Glass packing gland

Body

HandwheelStem packing retainer

Nut

Nameplate

1¾ (4.4 cm)

5 ¼(13.3 cm)

Open

SECTION 'X - X'

¾ (1.9 cm)

Stem packing gland

Stem packing

'B'

BallHandwheel

Stem

Bonnet

Stem packing nut

Vent connection = ¾" NPTFDrain connection = ½" NPTF

Vessel tailpipe

Ball retainer

Glass packing nut

Vessel coupling nut

Glass packing gland

Body

Bonnet coupling nut

Stem packing gland

NutNameplate

1 ¾ (4.4 cm)

6 ¼(15.9 cm)

Open

SECTION 'X - X'

StarGlass packing

Stem packing

Stem packing retainer

¾ (1.9 cm)

Spherical union½" NPTM 4 9/16 (11.6) -¾" NPTM 4 9/16 (11.6) -Stuffing box⅝" Dia. glass - 2 ¼ (5.7)¾" Dia. glass - 2 ¼ (5.7)Protector nut - 2 ⅞ (7.3)

Connection Dimension 'A' in inch (cm) Dimension 'B' in inch (cm)

SERIES N2

SERIES K2

7


TABLE 7 - SERIES N2 MATERIALS

Ref.no. Description

Standard materials

Optional materialsCarbon steel

to -20°FSTS construction

to -325°FSour gas service

to -20°FLow-temp.

to -50°F11 Body ASTM A105

(forged)Carbon steel

ASTM A182(forged)

Gr. F316/F316LSTS

ASTM A105 (forged)Carbon steel perNACE MR0175and/or MR0103

ASTM A350(forged)

Carbon steelGr. LF2 Cl. 1

ASTM A351 304/304L STS Gr. CF3ASTM A351 316/316L STS Gr. CF3MASTM A182 Gr. F304/F304L STSASTM A182 Gr. F51 Duplex 2205 STSASTM A494 Hastelloy B® Gr. N-12MVASTM A352 Carbon steel Gr. LCCASTM A743 Alloy 20 Gr. CN7MASTM B564 Monel® 400 N04400ASTM A494 Hastelloy C® Gr. CW12MWASTM A123 Galvanized steel

12 Vessel tailpipe ASTM A108Carbon steelAISI C1018

ASTM A276316/316L STS

ASTM A108Carbon steel

AISI C1018 perNACE MR0175 and/or MR0103

ASTM A350Carbon steelGr. LF2 Cl. 1

ASTM A276 304/304L, Duplex 2205 STSASTM B164 Monel® 400ASTM B473 Alloy 20 (CARP 20Cb3)®

ASTM B335 Hastelloy B®

13 Vessel coupling nut ASTM A108 Carbon steelAISI C1018

Investment cast316 STS

Investment cast316 STS

ASTM B574 Hastelloy C® 276ASTM A123 galvanized steel

14 Ball retainer ASTM A313 316 STS (spring wire) None15

T R

I M

Ball

ASTM A493, A262 or A276 316 STS

ASTM B574 Hastelloy C® 276Borosilicate glassASTM B473 Alloy 20 (CARP 20Cb3)®

ASTM B164 Monel® 400ASTM B335 Hastelloy B®

CRS 304 STSASTM A276 Duplex 2205 STS

17 Stem ASTM A582416 STS or ASTM A276

410 STS


ASTM A276316/316L STS per

NACE MR0175 and/or MR0103

ASTM A582416 STS

or ASTM A276 410 STS

ASTM A276 316/316L STSASTM A276 304/304L STSASTM A276 Duplex 2205 STSASTM B164 Monel® 400

18 Stem packing retainer MPIF SS-316N2-33 316 STS (sintered)

ASTM B473 Alloy 20 (CARP 20Cb3)®


ASTM B574 Hastelloy C® 27619 Stem packing gland25 Stem packing

Graphite compositeTeflon®

Viton®

26 Stem packing nut ASTM A108Carbon steelAISI C1018

Investment cast316/316L STS

ASTM A108Carbon steelAISI C1018




ASTM B574 Hastelloy C® 276ASTM A123 galvanized steel

28 Handwheel ASTM A216 Carbon steel Gr. WCB None30 Nut wheel or lever ASTM A563 Steel Gr. A None33 Star ASTM A108 Carbon steel AISI C1020 None34 Glass packing Graphite composite

Teflon®

Viton®

36 Glass packing gland

MPIF SS-316N2-33 316 STS (sintered)

ASTM A276 316/316L STSASTM A276 304/304L STSASTM A276 Duplex 2205 STSASTM B164 Monel® 400ASTM B473 Alloy 20 (CARP 20Cb3)®


ASTM B574 Hastelloy C® 27637 Glass packing nut ASTM A108

Carbon steelAISI C1018




ASTM A276 304/304L STSASTM A276 Duplex 2205 STSASTM B164 Monel® 400ASTM B473 Alloy 20 (CARP 20Cb3)®


ASTM B574 Hastelloy C® 276ASTM A123 Galvanized steel

40 Guard rods ASTM A108 Carbon steelAISI C1018


ASTM A108 Carbon steelAISI C1018


None

261 Lever ASTM A395 Ductile iron None

8


TABLE 8 - SERIES K2 MATERIALS

Ref.no. Description

Standard materials

Optional materialsCarbon steel

to -20°FSTS construction

to -325°FSour gas service

to -20°FLow-temp.

to -50°F11 Body ASTM A105

(forged)

Carbon steel

ASTM A182

(forged)

Gr. F316/F316L

STS

ASTM A105 (forged)

Carbon steel per

NACE MR0175

and/or MR0103

ASTM A350

(forged)

Carbon steel

Gr. LF2 Cl. 1

ASTM A351 304/304L STS Gr. CF3ASTM A351 316/316L STS Gr. CF3MASTM A182 Gr. F304/F304L STSASTM A182 Gr. F51 Duplex 2205 STSASTM A494 Hastelloy B® Gr. N-12MVASTM A352 Carbon steel Gr. LCCASTM A743 Alloy 20 Gr. CN7MASTM B564 Monel® 400 N04400ASTM A494 Hastelloy C® Gr. CW12MWASTM A123 Galvanized steel

12 Vessel tailpipe ASTM A108

Carbon steel

AISI C1018

ASTM A276

316/316L STSASTM A108

Carbon steel

AISI C1018 per

NACE MR0175

and/or MR0103

ASTM A350

Carbon steel

Gr. LF2 Cl. 1

ASTM A276 304/304L STS ASTM A276 Duplex 2205 STSASTM B164 Monel® 400ASTM B473 Alloy 20 (CARP 20Cb3)®


13 Vessel coupling nut ASTM A108 Carbon steel

AISI C1018

Investment cast

316 STS

Investment cast

316 STS

ASTM B574 Hastelloy C® 276

ASTM A123 Galvanized steel14 Ball retainer ASTM A313 316 STS (spring wire) None15

T R

I M

Ball

ASTM A493, A262 or A276 316 STS




16 Seat ASTM A276 316/316L STS ASTM A276 316/316L STS

ASTM A276 304/304L STS

ASTM A276 Duplex 2205 STS

ASTM B164 Monel® 400




17 Stem ASTM A582

416 STS or ASTM A276

410 STS

ASTM A276

316/316L STS

ASTM A276

316/316L STS per

NACE MR0175 and/or

MR0103

ASTM A582

416 STS

or ASTM A276

410 STS18 Stem packing

retainer MPIF SS-316N2-33 316 STS (sintered)19 Stem packing gland20 Bonnet

ASTM A108 Carbon steel

AISI C1018

ASTM A276

316/316L STS

ASTM A108

Carbon steel

AISI C1018 per

NACE MR0175

and/or MR0103

ASTM A350

Carbon steel

Gr. LF2 Cl. 1

ASTM A276 304/304L STS

ASTM A276 Duplex 2205 STS

ASTM B164 Monel® 400




ASTM A123 Galvanized steel21 Bonnet Nut


AISI C1018

Investment cast

316 STS

ASTM A108

Carbon steel

AISI C1018

Investment cast

316 STS

25 Stem packing Graphite compositeTeflon®

Viton®

26 Stem packing nut ASTM A108

Carbon steel

AISI C1018

Investment cast

316/316L STS

ASTM A108

Carbon steel

AISI C1018

Investment cast

316/316L STS




28 Handwheel ASTM A216 Carbon steel Gr. WCB None30 Nut wheel or lever ASTM A563 Steel Gr. A None33 Star ASTM A108 Carbon steel AISI C1020 None34 Glass packing Graphite composite

Teflon®

Viton®

36 Glass packing gland

MPIF SS-316N2-33 316 STS (sintered)



ASTM B574 Hastelloy C® 27637 Glass packing nut ASTM A108

Carbon steel

AISI C1018

Investment cast

316 STS

ASTM A108

Carbon steel

AISI C1018

Investment cast

316 STS




40 Guard rods ASTM A108 Carbon steel

AISI C1018

ASTM A276

304/304L STS


AISI C1018

ASTM A276

304/304L STSNone

261 Lever ASTM A395 Ductile iron None

9

* Acceptable for ASME service


TABLE 9 - SERIES N2/K2 STANDARD/OPTIONAL FEATURES

FeatureN2A K2A N2B K2B N2C K2C

Std. Opt. Std. Opt. Std. Opt. Std. Opt. Std. Opt. Std. Opt.PatternOffset X - X - X - X - X - X -BonnetIntegral X - - - X - - - X - - -Union - - X - - - X - - - X -Gauge connectionStuffing box ⅝" glass diameter X - X - - - - - - - - -

¾" glass diameter - - - - X - X - X - X -Vessel connectionUnion ½" NPTM X - X - - - - - - - - -

¾" NPTM - - - - X - X - - - - -1" NPTM (non floating) - - - - - - - - X - X -

Solid shank ½" NPTM - X - X - - - - - - - -¾" NPTM - - - - - X - X - - - -1" NPTM - - - - - - - - - X - X

Socketweld ½" Male - X - X - - - - - - - -¾" Male - - - - - X - X - - - -1" Male - - - - - - - - - X - X

Flanged - X - X - X - X - X - XSpherical union ½" NPTM - X - X - - - - - - - -

¾" NPTM - - - - - X - X - - - -Vent connection¾" NPTF X - X - X - X - X - X -Drain connection½" NPTF X - X - X - X - X - X -Ball check shut-offHorizontal lower and upper gaugecocks X - X - X - X - X - X -Vertical lower/horizontal upper gaugecocks* - X - X - X - X - X - XOmitted* - X - X - X - X - X - XVacuum - horizontal upper and lower - X - X - X - X - X - XSeatIntegral X - - - X - - - X - - -Threaded (renewable) - - X - - - X - - - X -Backseating - - - X - - - X - - - XHandwheelw/ standard pitch threads X - X - X - X - X - X -w/ quick closing threads - X - X - X - X - X - XLeverw/ quick closing thread (¼ turn) - X - X - X - X - X - XGuard rods (4 per gaugecock set)¼" (6.4 mm) diameter - X - X - X - X - X - X

10

PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSSERIES N6 STRAIGHT PATTERN GAUGECOCKS

TABLE 10 - CENTER-TO-CENTER AND GUARD ROD DIMENSIONS (SEE DIMENSIONS ON PAGE 3)Model Dimension X, in. (cm) Dimension Y, in. (cm)N6A 1 ⅝ (4.1) ½ (1.3)

TABLE 11 - PRESSURE/TEMPERATURE (SUBJECT TO LIMITATIONS OF TUBULAR GLASS)

Model

Maximum working pressure, psi (kPa) at temperatures to:

Max. steam pressureWith standard Neoprene glass packing With optional Teflon® glass packing

-20°F (-29°C) 100°F (38°C) 200°F (93°C) 300°F (149°C) 400°F (204°C) N6A 200 (1380) 200 (1380) 190 (1310) 165 (1100) 125 (860) 125 (860)

OVERVIEW

The N6 series consists of model N6A (125 P-CL ANSI rating). It is only offered in bronze construction, ½” (DN 15) size with a wide range of features in straight pattern design.


FEATURES

• Straight pattern.• Integral bonnet.• Rigid vessel connection.• Ball check shut-off prevents loss of process fluid in the event of an accidental breakage of the tubular glass.• Drain cock furnished • Variety of vessel connections available.

A variety of optional features are available when specified. Optional materials can be specified for the gaugecock trim (trim consists of the stem, stem packing retainer and ball check). Standard and optional materials conform to ASTM specifications.

Steam ServiceSeries N6 gaugecock sets for steam service are available as an option

11

'A'

'B'


Handwheel

Screw

Stem packing nut⅛" NPTF

Drain cock

Body

Glass packing nut

Glass packing

BallNameplate

1 ¾ (4.4 cm)

2 ¾(7.0 cm)

Open

Stem

Glass packing retainer

Stem packing Stem packing retainer

TABLE 12 - SERIES N6 DIMENSIONSConnection Dimension 'A' in inch (cm) Dimension 'B' in inch (cm)Solid shank½" NPTM 2 ⅜ (6.0) -Socketweld½" Male 2 ⅜ (6.0) -Flanged½"-150 P-CL R.F. 2 ½ (6.4) -½"-300 P-CL R.F. 2 ½ (6.4) -Stuffing box⅝" Dia. glass - 1 ½ (3.8)Protector nut - 2 ⅛ (5.4)

TABLE 13 - SERIES N6 MATERIALSRef. no. Description Standard materials Optional materials11 Body Federalloy I-836® bronze None14 Ball retainer 18-8 STS (302-304 STS) None15

T R

I

M

Ball 316 Stainless steel (upper)Nickel-Plated steel (lower)

ASTM A493, A262 or A276 316 STSASTM B164 Monel® 400

17 Stem ASTM B21 CA alloy 464 Naval brass ASTM A276 316/316L STSASTM B164 Monel® 400

18 Stem packing retainer ASTM B291 sheet brass None25 Stem packing Graphite composite Teflon®

Viton®

26 Stem packing nut ASTM B21 CA alloy 464 Naval brass None28 Handwheel ASTM B85 aluminum None34 Glass packing Neoprene® Graphite composite

Teflon®

Viton®

35 Glass packing retainer ASTM B291 sheet brass None37 Glass packing nut ASTM B21 CA alloy 464 Naval brass None40 Guard rods ASTM B21 CA alloy 464 Naval brass None44 Drain cock ASTM B16 Brass None100 Handwheel screw ASTM B633 Zinc plated Carbon steel None

12


TABLE 14 - SERIES N6 STANDARD/OPTIONAL FEATURES

FeatureN6A

Std. Opt.PatternStraight X -BonnetIntegral X -Gauge connectionStuffing box ⅝" glass diameter X -Vessel connection (solid shank)Threaded ½" NPTM X -Socketweld ½" Male - XFlanged - XDrain connection⅜" NPTF X -Ball check shut-offVertical lower/horizontal upper gaugeckock X -Vertical lower/horizontal upper (steam service seat)* - XOmitted* - XSeatIntegral X -Handwheelw/ standard pitch thread X -Drain cockFurnished X -Guard rods (2 per gaugecock set)3/16" (4.8 mm) diameter - X

* Acceptable for ASME service

13


OVERVIEW

The N7 series consists of model N7A and N7B. They are offered in a choice of bronze, iron, steel and stainless steel constructions, in ½” to ¾” (DN 15 to 20) sizes with a wide range of features in straight pattern design.


FEATURES

• Straight pattern.• Integral bonnet.• Rigid vessel connection.• Ball check shut-off prevents loss of process fluid in the event of an accidental breakage of the

tubular glass.• Integral drain cock.• Variety of vessel connections available.

A variety of optional features are available when specified. Combinations of optional features and materials are available. Each combination is designated by the model number in the features table. Optional materials can be specified for the gaugecock body and trim (trim consists of the stem, stem packing retainer and ball check). Standard and optional materials are available for service as described by ASTM Specifications.

ASME Boiler CodeSeries N7 gaugecock sets that are acceptable for ASME Boiler Code are available as an option. These gaugecock sets have a vertical rising ball check shut-off in the lower gaugecock and a horizontal ball in the upper gaugecock.

TABLE 15 – CENTER-TO-CENTER AND GUARD ROD DIMENSIONS (SEE DIMENSIONS ON PAGE 3)Model Dimension X, in. (cm) Dimension Y, in. (cm)All models 2 (5.1) ¾ (1.9)

TABLE 16 - PRESSURE/TEMPERATURE (SUBJECT TO LIMITATIONS OF TUBULAR GLASS)

ModelMaximum working pressure, psi (kPa) at temperatures to:

Max. steam pressureWith standard Neoprene glass packing With optional Teflon® glass packing

-20°F (-29°C) 100°F (38°C) 200°F (93°C) 300°F (149°C) 400°F (204°C) 450°F (232°C) 500°F (260°C) BronzeN7A 200 (1380) 200 (1380) 190 (1310) 165 (1140) 125 (860) - - 125 (860)N7B 400 (2760) 400 (2760) 385 (2650) 335 (2310) 250 (1720) - - 250 (1720)Ductile ironN7A, N7B 500 (3450) 500 (3450) 460 (3170) 375 (2580) 290 (2000) 250 (1720) - 350 (2410)STL, STSN7A, N7B 500 (3450) 500 (3450) 500 (3450) 500 (3450) 500 (3450) 500 (3450) 500 (3450) 350 (2410)

14

'A'

'B'


Handwheel

Screw

Stem packing nut⅜" NPTF

Ball retainer

Body

Glass packing nut

Glass packing

BallNameplate1 7/16

(3.6 cm)

3 ½(8.9 cm)

Open

Stem

Glass packing retainer

Stem packing

Stem packing retainer

Glass packing gland

Ball/glass packing retainer

Drain stem

TABLE 17 - SERIES N7 DIMENSIONSConnection Dimension 'A' in inch (cm) Dimension 'B' in inch (cm)Solid shank½" NPTM 2 (5.1) -¾" NPTM 2 (5.1) -Socketweld½" Male 2 (5.1) -¾" Male 2 (5.1) -Flanged½"-150 P-CL R.F. 2 ¼ (5.7) -½"-300 P-CL R.F. 2 ¼ (5.7) -¾"-150 P-CL R.F. 2 ¼ (5.7) -¾"-300 P-CL R.F. 2 ¼ (5.7) -Stuffing box⅝" Dia. glass - 2 (5.1)¾" Dia. glass - 2 (5.1)Protector nut - 2 ⅝ (6.7)

15


TABLE 18 - SERIES N7 MATERIALS

Ref.no. Description

Standard materials

Optional materialsBronzeto -20°F

Carbon steelto -20°F

Ironto -20°F

STS constructionto -325°F

11 Body ASME SB584UNS C89836

Bronze

ASTM A216Carbon steel

Gr. WCB

ASTM A395Ductile iron


Gr. CF3M

ASTM A351 304/304L STS Gr. CF3ASTM A890 Duplex 2205 STS Gr. 4AASTM A494 Hastelloy B® Gr. N-12MVASTM A743 Alloy 20 Gr. CN7MASTM B564 Monel® 400 N04400ASTM A494 Hastelloy C® Gr. CW12MW

14 Ball retainer 18-8 STS (302-304 STS) None15

T R

I M

Ball

316 Stainless steel

ASTM A493,A262 or A276

316 STS




17 Stem ASME SB171CA Alloy 464

Bronze

ASTM A582 416 STS ASTM A276316/316L STS


18 Stem packing retainer ASTM B291Sheet brass

ASTM A240 sheet 316 STSASTM B335 Hastelloy B®

ASTM B574 Hastelloy C® 27625 Stem packing

Graphite compositeTeflon®

Viton®

Neoprene26 Stem packing nut ASME SB171

CA Alloy 464Bronze





ASTM B574 Hastelloy C® 27628 Handwheel ASTM B85 Aluminum None34 Glass packing

Neoprene®

Teflon®

Viton®

Graphite composite35 Glass packing retainer

ASTM A240 sheet 316 STS


35A Vertical ball seat/glass retainer MPIF SS-316N2-33 316 STS (sintered) ASTM B335 Hastelloy B®

36 Glass packing gland MPIF CT-1000-K26Bronze (sintered)

MPIF SS-316N2-33 316 STS (sintered) ASTM B574 Hastelloy C® 276

37 Glass packing nut ASME SB171CA alloy 464

Bronze





ASTM B574 Hastelloy C® 27640 Guard rods ASTM B21 CA alloy 464 Naval brass ASTM A582 303 STS None47 Drain stem ASME SB171

CA alloy 464Bronze





ASTM B574 Hastelloy C® 276100 Handwheel screw ASTM B633 Zinc plated Carbon steel None

16


TABLE 19 - SERIES N7 STANDARD/OPTIONAL FEATURES

FeatureN7A N7B

Std. Opt. Std. Opt.PatternStraight X - X -BonnetIntegral X - X -Gauge connectionStuffing box ⅝" glass diameter X - - -

¾" glass diameter - - X -Vessel connection (solid shank)Threaded ½" NPTM X - - -

¾" NPTM - - X -Socketweld ½" Male - X - -

¾" Male - - - XFlanged - X - XDrain connection⅜" NPTF X - X -Ball check shut-offHorizontal lower and upper gaugecocks (iron, STL, STS) X - X -Vertical lower/horizontal upper (bronze) X - X -Vertical lower/horizontal upper* - X - XOmitted* - X - XBall inspection plug**Furnished - X - XOmitted X - X -SeatIntegral X - X -Handwheelw/ standard pitch thread (iron, STL, STS) X - X -w/ quick closing threads (bronze) X - X -Drain cockIntegral X - X -Polished bodyBronze - X - XGuard rods (4 per gaugecock set)3/16" (4.8 mm) diameter - X - X

* Acceptable for ASME service** Required for ASME serrvice

17

'A''B'

'F''E'

'C'

'D'

'F'

#8 - 32UNC-2B

΄A΄

΄C΄

΄B΄

΄C΄

΄A΄

΄D΄ ΄D΄ ΄B΄

PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSACCESSORIES

TABLE 20 - GLASS UNION DIMENSIONS

Size MaterialDimensions in inch (cm)

A B C D E F⅝" and ¾" Carbon steel, brass and 316 STS 2 (5.1) 1 ½ (3.8) 1 ½ (3.8) 1 (2.5) 3 1/32 (2.5) 1 7/32 (1.3)

TABLE 21 - HYDRAULIC ADAPTER DIMENSIONS

Size MaterialDimensions in inch (cm)

A B C DUpper adapter ⅝" and ¾" Carbon steel, brass and 316 STS 1 63/64 (5.0) 1 ½ (3.8) ½ NPT 17/32 (1.3)Lower adapter ⅝" and ¾" Carbon steel, brass and 316 STS 1 63/64 (5.0) 1 ½ (3.8) ½ NPT 17/32 (1.3)

GLASS UNION

HYDRAULIC ADAPTER

Upper Lower

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PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSACCESSORIES

TABLE 22 - ACCESSORIES MATERIALSRef. no. Part description Standard materials Optional materialsGlass union34 Glass packing Neoprene®, Max. 300°F Grafoil®, Max. 500°F

Teflon®, Max. 500°FViton®, Max. 400°F

35 Glass packing retainer ASTM A240 sheet 316 STS None36 Glass packing gland MPIF SS-316N2-33 316 STS (sintered) None37 Glass packing nut ASTM A108


ASTM B21 CA Alloy 464

Naval brass


None

100 Screw 18-8 (304) STS None134 Adapter ASTM A108



Naval brass

ASTM A240316L STS

None

Hydraulic adapter11 Body ASTM A108



Naval brass


None

34 Glass packing Neoprene®, Max. 300°F Grafoil®, Max. 500°FTeflon®, Max. 500°FViton®, Max. 400°F

35 Glass packing retainer ASTM A240 sheet 316 STS None36 Glass packing gland MPIF SS-316N2-33 316 STS (sintered) None37 Glass packing nut ASTM A108



Naval brass


None

Refractive protector4 Nut ASTM A563 Gr. A steel, zinc plated None4A Nut Brass (knurled) None48 Glass Annealed glass PMMA (Acrylic sheet)77 End Aluminum Gr. G4A None100 Screw 18-8 (304) STS None100A Screw ASTM A449 steel, zinc plated None137 U-bolt Aluminum Alloy 6061 None293 Extrusion Aluminum Alloy UNS #A96063 None

19

PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSSELECTION GUIDE - PART 1

SELECTION GUIDE - PART 1 PART 2 - PAGE 20Example: N2A S S X C A X D E A C A G G S S XXXModelN2A Model N2A tubular gaugecockN2B Model N2B tubular gaugecockN2C Model N2C tubular gaugecockK2A Model K2A tubular gaugecockK2B Model K2B tubular gaugecockK2C Model K2C tubular gaugecockN6A Model N6A tubular gaugecockN7A Model N7A tubular gaugecockN7B Model N7B tubular gaugecockBody materialC Carbon steel (N7,N2,K2 only)S 316/316L SST (N7,N2,K2 only)B Bronze (N6,N7 only)G Ductile iron (N7 only)A Alloy 20 (N7,N2,K2 only) M Monel® (N7,N2,K2 only)H Hastelloy 'C'® (N7,N2,K2 only)F 304/304L SST (N7,N2,K2 only)Trim materialC 416 SST (standard on Carbon steel and ductile iron body)S 316/316L SST (standard on 316 SST body, N7,N2,K2 only)B Bronze (standard on bronze body, N6,N7 only)A Alloy 20 (N7,N2,K2 only)M Monel® (N7,N2,K2 only)H Hastelloy 'C'® (N7,N2,K2 only)F 304/304L SST (N7,N2,K2 only)NACE MR-01-75 and/or MR-0103X NoneE NACE environmentalVessel connection sizeC ½"E ¾"F 1"Vessel connection typeA NPT male unionB NPT female unionC Socket weld male unionD Socket weld female unionE Spherical union NPT maleJ Solid shank NPT maleK Solid shank SW maleN Raised face SOP Flat face SOPressure class (if flanged)X None1 P CL 1503 P CL 3006 P CL 600Gauge connection sizeD ⅝"E ¾"

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PENBERTHY TUBULAR GLASS LIQUID LEVEL GAUGES AND GAUGECOCKSSELECTION GUIDE - PART 2

PART 1 - PAGE 19 SELECTION GUIDE - PART 2N2A S S X C A X D Example: E A C A G G S S XXX

Vent connection sizeX None (standard on N6, N7)B ⅜"C ½"E ¾" (standard on N2, K2)Vent connection typeX None (standard on N6, N7)A NPT female (standard on N2, K2)B Socket weld female F PluggedDrain connection sizeX None B ⅜" (standard on N6, N7)C ½" (standard on N2, K2)E ¾" Drain connection typeX NoneA NPT female (standard)B Socket weld female F PluggedG Drain cockStem packing materialN Neoprene®

G Grafoil® (standard)T Teflon®

V Viton®

Glass packing materialN Neoprene (standard on N6, N7)G Grafoil® (standard on N2, K2)T Teflon®

V Viton®

Stem operationS Standard close w/ handwheel (standard)A Quick close w/ leverB Quick close w/ handwheelC Standard close, back seat w/ handwheel (N2,K2 only)D Quick close, back seat w/ lever (N2,K2 only)E Quick close, back seat w/ handwheel (N2,K2 only)F Standard close w/ leverPaint specificationX NoneS StandardOptionsXXX None* Smooth body (N7 only)* Wire glass, plastic or sheet metal protector* Horizontal ball check* Vertical rise ball check lower gaugecock* ASME vertical rise ball check lower gaugecock plug* Ball check shut off omitted (ASME)* Vacuum service vessel connection (N2,K2 only)

* Option code assigned at time of order

NOTESHastelloy® is a registered trademark of Haynes International, Inc.

Grafoil® is a registered trademark of GrafTech International.

Monel® is a registered trademark of the Special Metals Corporation.

Viton® and Teflon® are registered trademarks of the Chemours Company.

20Cb3® is a registered trademark of Carpenter Technology Corporation.

Federalloy® is a registered trademark of The Federal Metal Company.

Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

Penberthy is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

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